It's a pretty awful solution in my opinion, because it is SO easy on bad teams. I could be on a team and dominate the enemy, hold the medals, but then in the last 20 seconds someone can be one-shot by an LB, their medals picked up, and the enemy team running away and winning the match my team dominated in. This happens soooo often, and it is so annoying.
It's to the point where I wish they'd either nerf or remove LB's in pvp, because one-shot gimmicks have nothing to do with skill, and exist as nothing more than a cheesy free kill.